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Add debugging for user sessions and authentication.

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This commit is contained in:
Brian Lycett 2020-05-04 10:48:46 +01:00
parent f103611e9c
commit 26d971080c
3 changed files with 40 additions and 8 deletions
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3
README.md
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@ -101,7 +101,8 @@ Optional:
* `SITE_NAME` (default: *LDAP user manager*): Change this to replace the title in the menu. e.g. "My Company"
* `LDAP_DEBUG` (default: *FALSE*): Set to TRUE to increase the logging level. This will output passwords to the error log - don't enable this in a production environment.
* `LDAP_DEBUG` (default: *FALSE*): Set to TRUE to increase the logging level for LDAP connections. This will output passwords to the error log - don't enable this in a production environment.
* `SESSION_DEBUG` (default: *FALSE*): Set to TRUE to increase the logging level for sessions and user authorisation. This will output cookie passkeys to the error log - don't enable this in a production environment.
Webserver SSL setup
---

1
www/includes/config.inc.php
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@ -32,6 +32,7 @@
#We'll use the username regex for groups too.
$LDAP_DEBUG = ((strcasecmp(getenv('LDAP_DEBUG'),'TRUE') == 0) ? TRUE : FALSE);
$SESSION_DEBUG = ((strcasecmp(getenv('SESSION_DEBUG'),'TRUE') == 0) ? TRUE : FALSE);
###

44
www/includes/web_functions.inc.php
View File

@ -40,7 +40,7 @@ function set_passkey_cookie($user_id,$is_admin) {
# Create a random value, store it locally and set it in a cookie.
global $LOGIN_TIMEOUT_MINS, $VALIDATED, $USER_ID, $IS_ADMIN;
global $LOGIN_TIMEOUT_MINS, $VALIDATED, $USER_ID, $IS_ADMIN, $SESSION_DEBUG;
$passkey = generate_passkey();
@ -54,7 +54,7 @@ function set_passkey_cookie($user_id,$is_admin) {
$filename = preg_replace('/[^a-zA-Z0-9]/','_', $user_id);
file_put_contents("/tmp/$filename","$passkey:$admin_val:$this_time");
setcookie('orf_cookie', "$user_id:$passkey", $this_time+(60 * $LOGIN_TIMEOUT_MINS), '/', $_SERVER["HTTP_HOST"]);
if ( $SESSION_DEBUG == TRUE) { error_log("$log_prefix Session: user $user_id validated (IS_ADMIN=${IS_ADMIN}), sent orf_cookie to the browser.",0); }
$VALIDATED = TRUE;
}
@ -64,7 +64,7 @@ function set_passkey_cookie($user_id,$is_admin) {
function validate_passkey_cookie() {
global $LOGIN_TIMEOUT_MINS, $IS_ADMIN, $USER_ID, $VALIDATED;
global $LOGIN_TIMEOUT_MINS, $IS_ADMIN, $USER_ID, $VALIDATED, $SESSION_DEBUG;
if (isset($_COOKIE['orf_cookie'])) {
@ -75,6 +75,7 @@ function validate_passkey_cookie() {
$VALIDATED = FALSE;
unset($USER_ID);
$IS_ADMIN = FALSE;
if ( $SESSION_DEBUG == TRUE) { error_log("$log_prefix Session: orf_cookie was sent by the client but the session file wasn't found at /tmp/$filename",0); }
}
else {
list($f_passkey,$f_is_admin,$f_time) = explode(":",$session_file);
@ -83,10 +84,23 @@ function validate_passkey_cookie() {
if ($f_is_admin == 1) { $IS_ADMIN = TRUE; }
$VALIDATED = TRUE;
$USER_ID=$user_id;
if ( $SESSION_DEBUG == TRUE) { error_log("$log_prefix Setup session: Cookie and session file values match for user ${user_id} - VALIDATED (ADMIN = ${IS_ADMIN})",0); }
set_passkey_cookie($USER_ID,$IS_ADMIN);
}
elseif ( $SESSION_DEBUG == TRUE ) {
$this_error="$log_prefix Session: orf_cookie was sent by the client and the session file was found at /tmp/$filename, but";
if ($this_time < $f_time+(60 * $LOGIN_TIMEOUT_MINS)) { $this_error .= " the timestamp was older than the login timeout ($LOGIN_TIMEOUT_MINS);"; }
if (empty($c_passkey)) { $this_error .= " the cookie passkey wasn't set;"; }
if ($c_passkey != $f_passkey) { $this_error .= " the session file passkey didn't match the cookie passkey;"; }
$this_error += " Cookie: ${_COOKIE['orf_cookie']} - Session file contents: $session_file";
error_log($this_error,0);
}
}
}
elseif ( $SESSION_DEBUG == TRUE) {
error_log("$log_prefix Session: orf_cookie wasn't sent by the client.",0);
}
}
@ -96,7 +110,7 @@ function set_setup_cookie() {
# Create a random value, store it locally and set it in a cookie.
global $LOGIN_TIMEOUT_MINS, $IS_SETUP_ADMIN;
global $LOGIN_TIMEOUT_MINS, $IS_SETUP_ADMIN, $SESSION_DEBUG;
$passkey = generate_passkey();
$this_time=time();
@ -105,6 +119,7 @@ function set_setup_cookie() {
file_put_contents("/tmp/ldap_setup","$passkey:$this_time");
setcookie('setup_cookie', "$passkey", $this_time+(60 * $LOGIN_TIMEOUT_MINS), '/', $_SERVER["HTTP_HOST"]);
if ( $SESSION_DEBUG == TRUE) { error_log("$log_prefix Setup session: sent setup_cookie to the client.",0); }
}
@ -113,7 +128,7 @@ function set_setup_cookie() {
function validate_setup_cookie() {
global $LOGIN_TIMEOUT_MINS, $IS_SETUP_ADMIN;
global $LOGIN_TIMEOUT_MINS, $IS_SETUP_ADMIN, $SESSION_DEBUG;
if (isset($_COOKIE['setup_cookie'])) {
@ -121,14 +136,26 @@ function validate_setup_cookie() {
$session_file = file_get_contents("/tmp/ldap_setup");
if (!$session_file) {
$IS_SETUP_ADMIN = FALSE;
if ( $SESSION_DEBUG == TRUE) { error_log("$log_prefix Setup session: setup_cookie was sent by the client but the session file wasn't found at /tmp/ldap_setup",0); }
}
list($f_passkey,$f_time) = explode(":",$session_file);
$this_time=time();
if (!empty($c_passkey) and $f_passkey == $c_passkey and $this_time < $f_time+(60 * $LOGIN_TIMEOUT_MINS)) {
$IS_SETUP_ADMIN = TRUE;
if ( $SESSION_DEBUG == TRUE) { error_log("$log_prefix Setup session: Cookie and session file values match - VALIDATED ",0); }
set_setup_cookie();
}
elseif ( $SESSION_DEBUG == TRUE) {
$this_error="$log_prefix Setup session: setup_cookie was sent by the client and the session file was found at /tmp/ldap_setup, but";
if ($this_time < $f_time+(60 * $LOGIN_TIMEOUT_MINS)) { $this_error .= " the timestamp was older than the login timeout ($LOGIN_TIMEOUT_MINS);"; }
if (empty($c_passkey)) { $this_error .= " the cookie passkey wasn't set;"; }
if ($c_passkey != $f_passkey) { $this_error .= " the session file passkey didn't match the cookie passkey;"; }
$this_error += " Cookie: ${_COOKIE['setup_cookie']} - Session file contents: $session_file";
error_log($this_error,0);
}
}
elseif ( $SESSION_DEBUG == TRUE) {
error_log("$log_prefix Session: setup_cookie wasn't sent by the client.",0);
}
}
@ -251,7 +278,7 @@ function render_footer() {
function set_page_access($level) {
global $IS_ADMIN, $IS_SETUP_ADMIN, $VALIDATED;
global $IS_ADMIN, $IS_SETUP_ADMIN, $VALIDATED, $SESSION_DEBUG;
#Set the security level needed to view a page.
#This should be one of the first pieces of code
@ -264,6 +291,7 @@ function set_page_access($level) {
}
else {
header("Location: //" . $_SERVER["HTTP_HOST"] . "/setup/index.php?unauthorised\n\n");
if ( $SESSION_DEBUG == TRUE) { error_log("$log_prefix Session: UNAUTHORISED: page security level is 'setup' but IS_SETUP_ADMIN isn't TRUE",0); }
exit(0);
}
}
@ -274,6 +302,7 @@ function set_page_access($level) {
}
else {
header("Location: //" . $_SERVER["HTTP_HOST"] . "/index.php?unauthorised\n\n");
if ( $SESSION_DEBUG == TRUE) { error_log("$log_prefix Session: UNAUTHORISED: page security level is 'admin' but IS_ADMIN = '${IS_ADMIN}' and VALIDATED = '${VALIDATED}' (user) ",0); }
exit(0);
}
}
@ -284,6 +313,7 @@ function set_page_access($level) {
}
else {
header("Location: //" . $_SERVER["HTTP_HOST"] . "/index.php?unauthorised\n\n");
if ( $SESSION_DEBUG == TRUE) { error_log("$log_prefix Session: UNAUTHORISED: page security level is 'user' but VALIDATED = '${VALIDATED}'",0); }
exit(0);
}
}